Carbureting apparatus for internal-combustion engines.



W. E. SWEET,

-GARBURETIN G APPARATUS FOR lNTER NAL COMBUSTION ENGINES.

' APPLICATION FILED OCT-19.1914.

Patented Feb. 26,1918.

u l weaves Sifter/"2114 WILLIAM E. SWEET, F DGWi! 1A6, MICHIGATQI.

CHEWING APPARATUS FDR IIQ'TERNAL-COMB'D'STIOW ENGINES.

1 257 422 6 Specification of Letters Patent. Pmtgmted Feb, 26 193 18,,

Continuation of application Serial Eic. 849,758, filed J'ulyB, 1314. This application filed catcher 18, 1314. :"lezial Ho. $61 ,308.

To all'whom it may concern: the intake manifold, together with thelcub Be it known that I, WILLIAM E. SWEET, a terfly valve working in the intake manifold.

citizen of the United States, residing at v Fig. IV is an enlarged detail view, par- Dowagiac, in the county of Cass and state tially in secti'om'taken on line corresponding 5 of Michigan, have invented certain new and to line H of Fig. I, showing the connecuseful Improvements in Carbureting Aption from the adjusting rod 14- to the carparatus for Internal-Combustion Engines, of bureters.

which the following is a specification. In the drawing, similar reference char- This invention relates to carbureting apactors refer to similar parts throughout the 10 paratus for internal combustion engines. several views, and the sectional views are 65 This application is a continuation of my aptaken looking in the direction of the little plication Serial No. 849,758, filed July 8, arrows at therends of the section lines. 1914. Considering the numbered parts of the o a Q I I 0 1 The obiccts of this 1nvent1on are: drawn 1 1s an internal combustion en no 15 First, to provide an improved carbureting provided with an intake manifold '2 and an apparatus by gneans of which kerosene or a exhaust manifold 3. The carburetor 4L hasv similar hydrocarbon may be used as fuel an air intake 5 and a. fuel supply pipe 6 for internalcombustion engines. which is connected with, a. fuel supply tank Second, to. provide an apparatus which not shown. A second carburetor '7 has an 20 can be readily attached to internal coinbusair intake 8 which is connected to the jacket tion engines of standard make by means of 9 extending upwardly and surrounding, for which such engines can be run with keroa portion of its length, the exhaust manifold sene or a similar hydrocarbon as a fuel. 3 ,so that the air which is supplied to the Third to provide an apparatus comprisair intake 8 flows through the acket 9 sur- 25 ing a pair of carburetors, one supplied with rounding the exhaust manifold 3 and is a less volatile and the other with a, more heated by the hot gases passin out through volatile hydrocarbon, delivering to the in the exhaust manifold. The carburetor 7 has take manifold of an internal combustion en a fuel supply pipe 10 which extends rear-- glue and provided with adjusting means so .wardly and is Wrapped around the end of 30 connected together that the adjustment of the exhaust manifold 3 and is then connect one of said carburetors to control the mixed to a fuel supply tank, not shown. The

ture thereof will adjust the other carbucarburetors 4 and 7 are of standard con reter similarly. struction with the exception that the but Further objects and objects relating to terfiy valve which is usually located near' 35 details and economies of construction and the point where the carburetor delivers into operation will definitely appear from the dethe intake manifold has been omitted. Each tailed description to follow, carburetor is provided with the usual stem I accomplish the objects of my invention 11, extending upwardly therefrom, which by the devices and means described in the controls the needle valve for adjustingthe -10 following specification. The invention is supply of fuel to the carburetor. Upon clearly defined and pointed out in the claims. each stem 11 is secured a disk 12 provided A structure constituting a preferred emwith a plurality of perforations 13. The bodiment of my invention is illustrated in 4 disk 12 upon the carburetor a has connected the accompanying drawing forming a part thereto a rod 14 (see Figs. I and IV) which 45 of'this specification, in which; extends upwardlythrough the dashlo and Figure I is a view in side elevation'of an terminates in a thumb nut 16, by meansof internal combustion engine equipped with which the mixture of the carburetor 4 can my improved apparatus. be controlled. The rod 14 has a pair of proig. II is a. transverse sectional, view on jecting prongs at its lower end which are 50 the line'22 of Fig. I, showingin top plan inserted in suitable holes inthe disk 12 so view the gasolene-and kerosene carburetors. as to rotate the same upon the rotation of Fig. III is an enlarged detail sect" nal the rod. The carburetors 4 and 7 can be view on the line 3-3 of Fig. II, showi in adjusted independently until the desired detail the three-way valve for controlling mixture is, secured. The wire 17 has each the flow of mixture from the carburetors to end thereof bent up and passed through one 314) 7'1 --0 e 'of the holes 13 in the edgecent disk 12 so that the two disks are connected together and when one of them is turned'tlie other turns with it. By this means the mixture of both cssbureters 4 and f is controlled by.

mixture from botli oi the carburetors will be delivered to the into-lie xnenifold.

The plug 19 is turned'by means of an arm 21 connected to the end of the link 22 which extends upwardly and reerwerdly through the dash l5.

vVitnin the lower end of the intake inanifold '2, just above the three-way valve 18, there is provided the butterfly valve 23. lliis valve is 0 stated by an arm 24 connected by a linl 25 to the arm 26 on the throttle control rod 2-7 which extends upwardly through the dash 15 to a point near the steering wheel in the usual manner.

From the description oi the putts given above, the operation oi my improved appsratus will be very readily understood, ln attempting to use kerosene as a fuel for in ternal combustion engines dificulty has been met with due to the foot tbot when the engins is started it is cold and kerosene does not vaporize readily, To overcome this difficulty l employ two carburetors, one bf which is connected with a gasolene supply tank or a supply of more volatile hydrocarbon, while the other carburetor is connected to e kerosene supply tank or a supply of less volatile hydrocarbon. The fuel supply ipc running from kerosene tank to the terosene carburetor is wound around the rear end of the exhaust manifold so that the supply of kerosene is heated by the hot gases within the exhaust manifold.- The air intake of the kerosenecsrbureter is connected with a jacket which surrounds the exhaust manifold so that the air supnly for the kerosene carburetor is heated by the exhaust gases. The two carburetors are connected with the intake manifold by a threeway valve 18. By turning the plug 19 the valve may be so adjusted that the kerosene carburetor 7 is cut off from the intake manifold altogether and only vapor from the gasolene carburetor is delivered into the intake manifold. This is the normal condition when the engine is started, at which time the gesolene vapor is used entirely, the I some being delivered irom the carburetor 4:

into the intake manifold. As the engine warms up'tlie turning plug 19 is gradually rotated to introduce into the manifold less vepozc from the gesolene cssbuseter l and more fronofl he kerosene carburetor '2 until,

after theeni'iilne has been running awhile,

nected by means of the wire or link 17 with the disk 12 on the kerosene carburetor so that the some movement is imparted to the disk 12 thereon. The supply of: mixture from the threewey valve to the intake manifold is governed by the butterfly valve 23 which is controlled from the throttle of the engine in the manner well mown in'the art.

The carburetors may be of any stenderd or desired construction and it is desirable to omit from them the usual butterfly valve. Both the air and the fuel supplied to the kerosene csrbureter are thoroughly warmed by the exhaust gases being delivered to the cerbui st er,

l have described the use of gosolcne and kerosene as the hydrocarbon fuels, but it will be understood that this invention is equally applicable with any hydrocarbon fuels, one of which is more volatile than the other. The spirit of my invention contemplates the use of a more volatile fuel for starting and the shifting from the more volatile fuel to the less volatile fuel as the engine War-ins up after running. While I have specified particularly herein a, three way velve, es the invention does not have to do with details of a three way valve but merely to the effect produced thereby, I desire to be understood claiming not only a three way valve but the equivalent thereof.

I am aware that the particular structure I have here shown is susceptible of considerable variation without departing from the spirit of my invention and, therefore, I do not WlSll to be restricted to the some. I have found, however, that this particular form is to be preferred and, therefore, I desire to claim the some specifically, as Well as broadly, es indicated by my appendedclaims.

Having thus described my invention, What i claim as new and desire to secure by Letters Patent, is:

1. In an internal. combustion engine, the combination of an exhaust manifold, en intake manifold, a carburetor provided with an air intake, at gesolene supply, a fuel supply pipe connecting said supply with said carburetor, a second carburetor, a jacket surrounding it fiortion 01'' said exhaust menicarburetor with said jacket, a kerosene supply, a fuel supply pipe connecting said'supply with said second carbureter, said fuel supply pipe being coiled around the exhaust manifold for a portion of its length, a three-way valve connecting said'carbnretcrs with said intake manifold, said valve being provided with a turning plug, an arm secured to the end of said turning plug, a link extending from said arm ,upwardly and rearwardly whereby said arm may be actuated, needle valve. stems extending up- .wardly from each of said carbureters, disks secured to each of said stems and provided with a plurality of perforations, a wire link having its ends disposed in one of the perforations of each of said disks and connecting the disks together, a rod connected to the disk on said gasolene carburetor and extending upwardly through the dash whereby the fuel of said carbureter may be adjusted, and a butterfly valve disposed in the intake manifold above said three-way valve and operably connected With the throttle, all coacting substantially as described and for the purpose specified.

2. In an internal combustion engine, the combination of an exhaust manifold, an intake manifold, a carbureter provided with an air intake, at gasolene supply, a fuel supply pipe connecting said supply with said carbureter, a second carbureter, a jacket surrounding a portion of said exhaust manifold, an air intake connecting said second carburetor with said jacket, a kerosene supply, a fuel supply pipe connecting said sup; ply with said second carbureter, said fuel supply pipe being coiled around the exhaust manifold for a portion of its length, a threeway valve connecting said carbureters with said intake manifold, said valve being provided with a turning plug, an arm secured to the end of said turning plug, a link extending from said arm upwardly and rear \vardly whereby said arm may be actuated, needle valve stems extending upwardly from each of said carbureters, disks secured to each of'sa'id stems and provided with a plurality of perforations, a wire link having its ends disposed in one of the perforations of each of said disks and connecting the disks together, a rod connected to the disk on said gasolene carbureter and extending upwardly through the dash whereby the fuel of said carbureter may be adjusted, all coacting substantially as described and for the purpose specified.

37 In an internal combustion engine, the combination of an intake manifold, a pair of standard carbureters, each of which is provided with a needle valve for controlling the fuel supply having an upwardly projecting needle valve stem, connections from said carbureters to said intake manifold, means for controlling the flow of mixture from said carbureters to said intake manifold, and means for simultaneously rotating said needle valve stems to adjust said needle valves.

l. In an internal combustion engine, the combination of an intake manifold, a throttle valve therein, a plurality of standard carburcters, each complete in itself, one for light hydrocarbon such as gasolene and the other for heavier hydrocarbon such as kerosene, the fuel supply pipe to the carbureter for the heavier fuel being disposed in proximity to the exhaust pipe to be heated thereby, means for simultaneously ontrolling the fuel supply to said carbureters to regulate the mixture, independent passages from the said carburetors to the intake manifold, a three-way valve for controlling the said independent passages from the carbureters to the manifold whereby the relative amount of mixture from said carbureters can be controlled to the extent of completely cutting off either one or the other, for the purpose specified.

5. In an internal combustion engine, the

combination of an intake manifold, a throttle valve therein, a plurality of standard carbureters, each complete in itself, one for light hydrocarbon such as gasolene and the other for heavier hydrocarbon such as kerosene, the fuel supply pipe to the carbureter for the heavier fuel being disposed in proximity to the exhaust pipe to be heated thereby, means for simultaneously controlling the fuel supply to said carbureters to regulate the mixture, independent passages from the said carbureters to the intake manifold, a jacket surrounding a portion of the exhaust pipe of said engine, and an air intake connecting the kerosene carburet'er Withsaid jacket, a three-Way valve for controlling the said independent passages from the carburetcm to the IHQHIfOldWhI-BIGlJyihE relative 

